DE2827659A1 - SYSTEM FOR REGULATING A FLOW RATE - Google Patents

Description

iJ "H; FF ν. f-OM £ S STRSHL SCHD3EL-HOPF E £ atälMGHAUS FINCK

Be more e ibuiis:

The invention relates to a system for regulating siner Duroiif flow rate, especially a system for setting and regulation of the amount of spray spray, liquid artificial fertilizer, etc., sprayed per unit area, with self-propelled or attached machines.

809882/0909

2827C-39

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In the known machines, the amount of liquid required per unit area cannot be applied evenly, but uniformity is an imraer more important requirement Drive wheels as well as the change in driving speed by + 30 % from the prescribed value. This deviation affects the crop yield and the economics of the plant prote z niittel-consumption.

3s has been proposed ("Regu-flo" system from Dcrrar-Scrs ^ ers Co. Ltd., SIy, Cabvs., England) to use a pump, the delivery rate of which is proportional to the speed , thus the irregularity of the spray quantity The disadvantage of this solution is that the slip and the fluctuation caused by the change in speed remain unchanged. This error is avoided by the company 13CNOJIA. The pump is driven by a hydrostatic drive The hydraulic motor driving the pump is controlled by an electronic controller as a function of the driving speed and the rotational speed of the hydraulic motor.

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BATH ORIGINAL

The U '.'. OhtBil cliose solution is that the hydrostatic drive is almost expensive and the rlenga sprayed out per unit of area ef ~ f3LtLv not; goaass ^ n. This tightness is, however, fundamentally dependent on the type, the condition, the plugging and the wear and tear of the oprit :: dü \ jen ga ^ sbsnan conditions at the highest possible .Fahrgeschwindiglcait is sprayed.

The purpose of the invention is to eliminate the above-mentioned disadvantages of the known solutions.

The 3r.flndung is based on the task, the Ourchi'luiJT.er: ^: e due to the training de3 backed up \ / ege3 "u rareli ". a'l £ o depending on the fahrggacli'vindiglceit.

According to this , the object is achieved in that a flow meter is arranged in a main pressure line leading directly to a fuel frame connected is. The output of the counter is connected to the input of a memory. The Losca input of the counter and the

■ 809882/0909

BATH ORIGINAL

of the memory "ind nit ds'a output an a · V / egegender connected * The ain ^ a input ai» nea coraparator is with the output aiiieg setpoint generator and the other input with urine. .! Output connected to the memory, the comparator output Dar is · when: sine η Drsipunktsohaitar to the input of a load connected to the machine Stellainheit Flussigkaitakrsla is connected *

With an advantageous form of watch The invention is the three-point switch via its limit switch to the input of the 3 structural unit connected * Vorteilhaffcerwei3a contains the Three-point retainer ainea sweipoint retainer and one in order to; Utnkehrschalter * Eer shelled in Heine a.output of the two-point switch is with the first Sirs passage of the reversing switch and a current sensor with one input of a second! Comparator connected »The output of the first! Comparator is at the second input of the3 second to the comparator, to the input of the two-point switch and to the other input of the ürnkahrschaltars switched. The output of the second comparator is connected to a second control unit via a signal converter · The Tsilar unit is advantageous from counting chains and pre-selection sohaltarn constructed · The first setting unit contains av / angularly 8 a valve operated by a servomotor is controlled.

8 82/0

j> ji dor orfindungageiaünoen Lu.vuig dor ge 3 te 11 fee η task νιο lot dio Rögloranlage Piihlar - V / g encoder and "Durchflua ^ megoer - on, due to the signals of this Ri-hloi- the desired change of the The flow rate through the first setting and, if necessary, the change in the driving speed is carried out by the next tunnel unit. indisposition and furthermore where the changes in the state associated with the Vorochleissea and the obstruction of the Büaon are regulated »

The inventive Regloranloge allows not only a simple manual setting, and automatic regulation of the desired flow rate per unit area (specific flow rate), but also a favorable range of the flow rate and an optimal quality of work. In this .V / aise it is possible zn a grös3tmögliche driving speed in addition to the optimal Arbeitsqualitat reach * V / snn the I.Iaschine may AU3 this. Area that runs out of work qua Ii tat ^ the bowler changes the speed,

The doe using Voi ^v "vahlnchalS; compared ers manually programmed Durchflussmenge- is the effective flow rate" Are these values

809882/0909

! 827öS,

different, a command signal for the harvest is set up Stelloinhei J; ^ born to change the flow rate * If the desired value of the specific flow rate is not set due to the change in the flow rate; a command «ig na 1 for the second control unit, which controls the drive of the aaIbsi-driven machine or the tractor, is given to change the speed accordingly ₃ and thereby guarantee the required specific flow rate *

The per unit area effectively sprayed will Fluss.ißlcoitmenga with a Help represent signals in the built-din main pressure line of the machine Durchfluancneaaero UML dea V / sgegebera in the central unit determines · The Wegageber directly or übor a Wegenieaserrad with; a free-running ', d _a h # un-driven wheel of the machine, coupled "The central unit determines the per unit area sprayed off JPlUasigkeitamenge due to the flow rate and the distance traveled, the working width (the width of the sprayed strip of land) inputted by a code switch ,

; The controller works digitally on * The working width of the machine and the desired specific "flow rate can be set with the help of operating elements,

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In Gegensatz.zu known regulators erfindungsgaraäas is dia programming gewünschtön not wait by changing the target value, but by changing the Tailungsverhältnisäea represents Sailareinheiterii the 3ind arranged the control circuit in represents feedback circuit -vorgenommen · The constant binary size of the set point be ~ atimtat only the width of the Uhemensensibillichkeitsbaraiches des Heglars, With the proposed solution, the expenditure, especially the expenditure on the electronic components, can be kept at a favorable value *

The invention? / Is explained in more detail using an implementation appendix. " In the drawings Iat JIg * 1 the arrangement of the ragler system and? Lg # 2 the block diagram of the controller system,

Fig. 1 shows the arrangement of the system for hailing the flow rate on the machine group consisting of a tractor and a towed Efianzenachutzmaachine. first actuating unit 27 is composed of a Vantil 4, _(controls the flow rate, and from which the valve controlled servomotor 5 * the ejected "Plüsaigkeitsmenga is measured by the flowmeter 6 * a central unit 7

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2027659

arranged in the tractor cab «The aentral unit 7 iufc'niit preselection control aar adjustment of the working width and the desired specific flow rate provided · The wide setting unit δ is coupled with the control unit of the tractor drive »

Pig * 2 illustrates the block diagram of the control circuit "The central unit 7 is composed of a main circuit and a sub-loop" The Hauptlereis binary counting chains 19j 9, Vorwahlachalter 20 »21, a counter loj includes a memory 11, a comparator 12 _5, a desired value transmitter 13» an electronic two-point switch 14 and a reversing switch 15 "The subordinate loop contains a Stroinfi.ih.ler 16 _f a second comparator 17 and a signal converter 18 · The controller is connected to the fluidity circuit with the aid of the servomotor 5 and the flow meter 6" The fluidity circuit contains daa valve 4, the spray liquid tank 23? an energy source 24, a spray frame 25 and a pump 26,

The actual value is supplied by the flow arena 6 as a pulse sequence »The frequency of the Pulse train is proportional to the speed of the flowing liquid »The pulse train arrives Via the binary counting chains 19, 9 to the write input of the counter 10 »Der We geber 3j eier

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2827C59

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iSäftlar 10j and the storage Xl provide represents per flächeneinheis ejected FUisaigkeitaisenge 'proportional binary number so forth> that the balance sensor 3 after passing through a path unit an α Impula to dan clear input of the Zählars 10, and to the 2akteingang the memory 11 are ₃ whereby the instantaneous content of the counter IO singeschrittenη in the memory 11 and the counter 10 is cleared · The binary number at the output of the memory 11 (the actual value x _{e of} the control loop) remains unchanged until the next sampling. This value is compared with the setpoint value χ with the aid of the digital cotaparator 12 * The setpoint value is supplied by the setpoint generator 13.

⁷ S \ ^x a> ^x s ~ ^x a> ^x e ) ^x a * ^{Baa s} "^ ^elisi Snal 3 ^ ₁ is produced by the electronic two-point switch 14 and the reversing switch 15. The switch 14 generates from the output of the comparator 12 The signal available in binary code is a current signal that can have two possible values? I = O and i = I _7n * ^Εθ ^ The current value in the switched-off state is 0 (in this Fa11a χ _Λ = x_) and I, _n is the operating current dea Servomotor 5 (: c _Q 4 x _a ) * The direction of the control signal 3 ^ - ,, ά · 1α · the current and direction of rotation 'of the servomotor 5 is determined by the reverser 15?

809882/0909

£ -27C5 '

due to the comparator "12 güliaiört-Hi binary actual _{value x p} determine!;, Bor mechanical creation; Endochromatic switch 22 occurs when the comparator 12 in the corresponding size position of the valve gives a signal to further increase or decrease the flow rate The amount of liquid outside the valve range is when this state occurs is detected by the current sensor 16 and the second compressor, if a signal of an increase or decrease in the flow rate occurs at the output of the comparator 12 and the output of the switch 14 is de-energized, the speed of the machine group is determined by the comparator 17 via the signal converter 18 and the second setting unit 8 correspondingly influenced »Dis from the setting unit B, the current sensor 16, the comparator 17, and the subordinate loop existing 18 ■ ^? 3t in operation until the size of the flow rate, which is characterized by the latv / ort dee main crown, vdeder in dan rjgel-

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Lörüich tiaa valves 4 k ^ nuic, "

The. ^ Ay / unac-rite Du.roiiiiiu ^ aaeu ^ a mid given working width of the machine can nti b the help of the Yo! Selector switch 21 uud 20 oingssaidllfc, whereby dtö genfinnten Vünmiiläuhalto ^ dao Töilaryerhäll; ni3 influence the binary Zluilkatton 9 ^ 19 »At the instigation, the framework constant don DurclifluaarTiogsera δ and the 3oilv / ert are also taken into account * The Gröarfa dea Sol ^r > vertea bestiniin-f; the .Brei ce de.3 DniainpfiüdiiciilceitsbereiGhsa of the controller "When a." B, the SoIl-7 / ert 20 i3t, is the "width of the sensitive kaita band 5 #." Vtemn on Au "gang dea Speiohera Il 5ine binary ^ ₃ ~ x _r - occurs 20 attacks ier regulator niohf; a * The intervention kotnait only in the case before when the Latv / ert inindestena to 5;" five large _(n .X = 21) or smaller (x _a »19) than the nominal value.

809882/0909

Claims (5)

h 2 8 2 7 6 p SCHIFF v.FÜNER STREHL SCHÜSEL-HOPF EBBiNGHAUS FINCK MARIAHILFPLATZ 2 & 3, MÜNCHEN SO POSTADRHSSE: POSTFACH 35 O1 6O, D-8O0O MUNICH 95 Mezögazdasagi Gapkisarlati Intezet KARL LUDWIG SCHIFF RIPL. CHEM. DH. ALSXANDHf? V. FÜNSfi DIPL. IMS. PHTHH STR = HL DIPL. CHHM. DR. URSULA SCHÜ3EL-HOPF DIPL. INQ. DIETER EB3INGHAUS DR. INQ. DIETER FINCK TEUEFON (OS9) 48 2O54 THLEX 5-23 565 AURO D MMS auromarcpat Munich DSA-I8663 June 23, 1973 AHLAG-B ZUxR REGULATION OF THE FLOW RATE Claims -.nlagr to regulate the flow rate, especially for ■ eir.e - · = driven or towed machine, for adjustment and regulation, one per unit area of the machine ejected amount of liquid, which machine a liquid circle with a splash frame and one on has the unit connected to the liquid circuit, marked thereby that in the main pressure line of the liquid circuit, which is directly leads to the spray frame (25), a flow meter (6) is arranged, the output of the flow meter (6) over a divider unit (9, 21, 19, 20) is connected to the write input of the counter (10), the clear input of the Counter (10) connected to the output of a position transmitter (3) '^; O 98 82/090 9 fc- O is the output of the counter (1Q) at the write input of the memory (11) is connected, the clocks irigiüiig des The memory (11) is connected to the α output of the ¥ egagebers (3) is, the output of the memory (11) is connected to an input of the Kouipara sector (12), the other input that ! Comparator (12) is connected to the output of a setpoint generator (13), and the output of! Comparator (12) via a three-point switch (14, 15) is connected to the input of an actuating unit (27). 2. Control system according to claim 1, characterized in that g a ~ indicates that the output of the three point ^ aL-dec -'14, 15) via a limit switch (22) to the entrance ier £ ~ unit (27) is connected. 3- Regelarlage according to claim 1 or 2, characterized marked that the drain point switch (1-S 15) a two-point switch (14) and a reversing switch (15) contains, the output of the two-point switch (14) on the one hand with the first input of the reversing switch (15) and on the other hand via a current sensor (16) with the. an input of the second! Comparator (17) is connected, the Output of the first comparator (12) to the other output of the second comparator (17), to the input of the two-position switch (14) and is connected to the second input of the reversing switch (15), and that the output of the second Comparator (17) with a signal converter (13) varbun- SO9882 / 0909 ORIGINAi. INSPECTED that is. its output to the input of a second control unit (8) is connected. 4. Rege! Plant according to one of claims 1 to 3, characterized in that the dividing unit Contains (9, 21, 19, 20) counting chains (9, 19) and preselection holder (20, 21). 5. Control system according to one of claims 1 to 4, characterized in that there is the first Setting unit (27) contains a valve (4) controlled by a servomotor (5). B Π 9 RR 2 I 0 9 D 9